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Stomach acid is a chemical barrier against pathogens. The low pH of the acid creates an environment in which pathogens are unable to survive and will often kill them.
Mucous is a physical barrier against pathogens. It acts to trap pathogens to prevent them from entering the body any farther.
Wiki User
∙ 10y ago
Wiki User
∙ 12y agoStomach acid kills (by digesting) microbes which enter through our mouth. They move along our digestive system and will eventually end up in the stomach which contains hydrochloric acid.
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What are the three body's line of defense?
The body's three lines of defense against a pathogen (germ) are: 1. Anatomical and physiological barriers-Includes skin, hair, mucous membranes, saliva, tears, stomach acid, pH, temperature. 2. Non-specific response-Includes phagocytosis of pathogen, inflammation of tissues, vasodilation (increased blood flow to area), and swelling. 3. Specific response-antibody production and cell mediated immunity to particular pathogen. Maintained indefinitely.
What are the body's three defense lines?
The body's three lines of defense against a pathogen (germ) are: 1. Anatomical and physiological barriers-Includes skin, hair, mucous membranes, saliva, tears, stomach acid, pH, temperature. 2. Non-specific response-Includes phagocytosis of pathogen, inflammation of tissues, vasodilation (increased blood flow to area), and swelling. 3. Specific response-antibody production and cell mediated immunity to particular pathogen. Maintained indefinitely.
How does the first line of defense protect the body against pathogens?
The body's three lines of defense against a pathogen (germ) are: 1. Anatomical and physiological barriers-Includes skin, hair, mucous membranes, saliva, tears, stomach acid, pH, temperature. 2. Non-specific response-Includes phagocytosis of pathogen, inflammation of tissues, vasodilation (increased blood flow to area), and swelling. 3. Specific response-antibody production and cell mediated immunity to particular pathogen. Maintained indefinitely.
Can mucous membranes be a defense mechanism against infectious disease?
Yes
Why the protein of small intestine itself is not digested?
Possible Answers: The epithelial cells lining the stomach have specialized defensive properties against stong acids Mucous found within the stomach The stomach's epithelial cells are defenseless against stong acids The stomach has a pH of 7 when digestion isn't taking place Correct answer: Mucous found within the stomach Explanation: A layer of mucous forms between the epithelial cells of the stomach and the acid within the stomach. This mucous is secreted by mucous cells lining the stomach. When the mucous layer is broken down, certain complications can take place (e.g. stomach ulcers).
What are five major barriers against pathogens?
Tears, saliva, skin, mucous membranes, and stomach acid
What organ is your first line of defense against pathogens?
The integumentary system (skin) and mucous membranes are the first line of defense. They provide a physical barrier against invasion of pathogens. Any break in this physical barrier, such as a cut, makes it easier for pathogens to enter your body.
What is pylogical defense?
Host defenses that protect against infection include natural barriers. Such barriers are skin, or mucous as an example.
What are two types of immune respones in the second line of defence?
The body has three main lines of defense against pathogens. They are as follows:First line of defense: Skin, Mucous membranes, and Secretions of skin and mucous membranesSecond line of defense: Phagocytic white blood cells, Antimicrobial proteins, and the Inflammatory responseThird line of defense: Lymphocytes, and Antibodies
Which of these is the human body's first line of defense against invading pathogens such as bacteria and viruses?
skin and mucous membranes
What organ produces a mucoid barrier to prevent self-digestion?
The stomach contains mucous neck cells that make mucous to coat the epithelial cells lining the stomach. Without the mucous, the acidity and pepsin in the stomach would break down the lining of the stomach and create ulcers.
Structural adaptation in physical digestion of the stomach?
Your stomach is coated with mucous coat. This is made of sugars and there is no peptide bond, there in mucous. So the stomach is protected from the killing action of pepsin enzyme on the stomach wall.
